Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 47 views

    Design Assumpttions: Geometry y & Layout

    Uploaded by

    Michael Protopapas
    The document provides design assumptions and modeling details for a trestle structure consisting of a main frame with 3m spacing, a 75m long trestle with a 7m width and 1.5m deck level, and a 10m x 12m end platform with a 2m deck level. Piles are 244mm steel pipes filled with C25/30 concrete. Timber beams and decking are specified. Soil properties and subgrade reaction values are presented. Loads including self-weight, live loads, and wave loading are defined. The STAAD analysis results in deflections up to 15.3mm and stresses within utilization limits for all components.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Design Assumpttions: Geometry y & Layout

    Uploaded by

    Michael Protopapas
    47 views15 pages
    The document provides design assumptions and modeling details for a trestle structure consisting of a main frame with 3m spacing, a 75m long trestle with a 7m width and 1.5m deck level, and a 10m x 12m end platform with a 2m deck level. Piles are 244mm steel pipes filled with C25/30 concrete. Timber beams and decking are specified. Soil properties and subgrade reaction values are presented. Loads including self-weight, live loads, and wave loading are defined. The STAAD analysis results in deflections up to 15.3mm and stresses within utilization limits for all components.

    Original Description:

    simple assumptions for a jetty design

    Original Title

    Jetty Analysis

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    The document provides design assumptions and modeling details for a trestle structure consisting of a main frame with 3m spacing, a 75m long trestle with a 7m width and 1.5m deck level, and a 10m x 12m end platform with a 2m deck level. Piles are 244mm steel pipes filled with C25/30 concrete. Timber beams and decking are specified. Soil properties and subgrade reaction values are presented. Loads including self-weight, live loads, and wave loading are defined. The STAAD analysis results in deflections up to 15.3mm and stresses within utilization limits for all components.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    47 views15 pages

    Design Assumpttions: Geometry y & Layout

    Uploaded by

    Michael Protopapas
    The document provides design assumptions and modeling details for a trestle structure consisting of a main frame with 3m spacing, a 75m long trestle with a 7m width and 1.5m deck level, and a 10m x 12m end platform with a 2m deck level. Piles are 244mm steel pipes filled with C25/30 concrete. Timber beams and decking are specified. Soil properties and subgrade reaction values are presented. Loads including self-weight, live loads, and wave loading are defined. The STAAD analysis results in deflections up to 15.3mm and stresses within utilization limits for all components.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    You are on page 1of 15

    DesignAssumpttions

    Geometryy&Layout

    MainFram
    meSpacing:3
    3.0m

    TrestleLe
    ength:75m

    TrestleW
    Width:7m

    TrestleDe
    eckLevel:1.5MSL

    EndPlatfo
    orm:10mx1
    12m

    EndPlatfo
    ormDeckLevvel:2.0MSL

    Page 1

    MainFram
    meColumnSp
    pacing:3.15m
    m

    PipeSectiions(CircularSteelPilefille
    edwithconcrrete):

    StteelHollowSection:Diam
    meter244mm&Thicknesss16mm(S3555)
    ConcreteFill:C25/30

    PileBracin
    ng(Xtype):

    Rods:Diamete
    er24mm(S2
    275)

    Page 2

    ongitudinalBe
    TimberLo eams(D40type): TimberTransversBeeams(D40typ
    pe):
    Width200mm
    W Width200m mm
    Height300mm m Height250m mm


    TimberDe
    eck: TimberDeckCurbs:
    Width175mm
    W Width230m mm
    Th hickness76mmm Thickness1000mm


    Page 3
    MATERIALS

    Piles:S355(Grade43)

    Plates:S275

    Rods:S275

    Bolts/Nuts/Washers:Grade8.2

    Timber:D40

    Page 4

    SOILCHARACTERISTIC
    CS

    SoilInvesstigationRepo
    ort

    Page 5
    Subgrade
    eReactionUsedintheAnaalysistoestim
    matetheHorrizontalSprin
    ngs

    SubbgradeReacttion
    SoilLaye
    erDescription
    n LayyerThickness UsedforrthespringM
    Modelling
    kN/m3
    LayerA SeaBead
    dto2.5m 20,000
    d&gravel)
    (softsand
    LayerB 2.5mto
    o5.0m 50,000
    (medium/Densesand d
    &gravel)
    LayerC Below5
    5.0m 100,000
    (rock)
    Reference es

    (i) HorizontalSubgradeReacttiontobeuseedforthedessignoflateralllyloadedpilees
    BowlesH

    (ii) BowlesSubgradeReaction

    Page 6
    VerticalC
    CapacityofPileVerticalSSpringCalculations

    Page 7

    Page 8
    Page 9
    PileSpringValuesusedintheAnalysis

    PILESPRINGSUSEDINTHEDESIGN
    HorizontalPointSprings Vertical
    Depth (corresp.to1mheight) Spring
    (m) (kN/m) (kN/m)
    0
    0.5 10,000
    1.5 30,000
    2.5 95,000
    3.5 175,000
    4.5 350,000
    5.5 550,000

    bottomend 100,000

    Page 10
    LOADS
    L
    SelfWeigght&OtherD
    DeadLoads

    m3
    SteelDensity:78kN/m

    m3
    D40):5.9kN/m
    Timber(D

    Loadfacto
    orforULS=1
    1.35&forSLSS1.0

    LiveLoadonDeck:5kkN/m2

    orforULS=1
    Loadfacto 1.5&forSLS1
    1.0

    adonPiles
    WaveLoa

    Page 11
    Reference
    etotheabovvecalculation
    nsare

    WaveHeight=
    W =4.5m
    WavePeriod=
    W =12sec
    Se
    eaDepth=3..0m
    PileDiameter=
    =244mm

    Thewave
    eloadingista
    akenfromfirsstprinciplefo
    ormulasconssideringtheffollowingstep
    ps:

    Step#1:ShallowWater

    Step#2:FormulasforrWaterVeloccity&Accelerrations&etccforShallowWater(BreakkingWaves)

    Page 12
    WaveLoadDirections

    90ofromEast
    120ofromEastSouthEast
    135ofromSouthEast
    150ofromSouthSouthEast
    180ofromSouth
    210ofromSouthSouthWest
    225ofromSouthWest
    250ofromWestSouthWest
    270ofromWest

    Page 13

    Analysis/
    A Designb
    bySTAAD
    Dpro/Mo
    odelling
    IsometricView

    EndPlatfo
    ormFrame TresttleTypicalFraame

    Page 14

    ANALYSIS&DESIGNRESULTSUMMARY(STAADproRESULTS)
    1) DEFLECTIONS

    HORIZONTALDEFLECTIONSATDECKLEVEL(TOPOFPILES)

    TopofEndPlatforminthedirectionparalleltothetrestleaxis=15.3mm(wavefromSouth)
    TopofEndPlatforminthedirectiontransversetothetrestleaxis=6.5mm(waveeastwest)

    TopofTrestleDeckinthedirectionparalleltothetrestleaxis=14.5mm(wavefromSouth)
    TopofTrestleDeckinthedirectiontransversetothetrestleaxis=7mm(waveeastwest)

    PILEDEFLECTIONSATSEABEDLEVEL

    PileHorizontalDeflectionatseabedinthedirectionparalleltothetrestleaxis=4.7mm
    PileHorizontalDeflectionatseabedinthedirectiontransversetothetrestleaxis=3.5mm

    PileVerticalDeflectionatseabed=1.6mm

    2) STEELPILES
    MaximumTensileStress=66MPa
    MaximumCompressiveStress=51MPa

    Utilization=0.41

    3) STEELRODS
    MaximumTensileStress=127MPa

    Utilization=0.54


    4) TIMBERLongitudinalBeams
    Utilization=0.41


    5) TIMBERTransversBeams
    Utilization=0.42

    Page 15

    You might also like